Potterton Promax Combi 24 HE Plus Installation & Service Instructions Manual page 31

Inner Flue Support Bracket
Apply Lubricant for
ease of assembly.
Ensure Flue is fully
engaged into Flue
Elbow
25mm
Tape
Cut End
Apply Lubricant for
ease of assembly.
Ensure Extension is
fully engaged into
Boiler Adaptor
© Baxi Heating UK Ltd 2007
Fig. 53
Slots at bottom
Fig. 55
Fig. 54
Extension
Fig. 56
Fig. 57
10.0 Installation
10.6 Fitting the Flue (Cont)
6. The inner flue duct support bracket may be in the waste
portion of the flue. In this case retrieve the bracket before
discarding the waste.
7. Take the inner flue support bracket (if not already fitted)
and engage it over the flue duct. This will centralise the flue
and air ducts, and ease assembly (Fig. 53).
8. Insert the flue through the hole in the wall. Fit the elbow
to the boiler adaptor, ensuring that it is pushed fully in.
9. Draw the flue back through the wall and engage it in the
elbow. It may be necessary to use soap solution or similar
to ease assembly of the elbow adaptor and flue (Fig. 54).
10. Ensure that the terminal is positioned with the slots to
the bottom (Fig. 55).
IMPORTANT: It is essential that the flue terminal is fitted
as shown to ensure correct boiler operation and prevent
water entering the flue.
11. Make good between the wall and air duct outside the
building.
12. Fit the flue trim if required, and if necessary fit a terminal
guard (see Section 8.8 & 8.9).
CONCENTRIC VERTICAL FLUE
13. Once the length of the vertical concentric extension has
been determined mark and carefully cut off the excess
material. The cut end MUST be square and free of burrs to
ensure correct insertion into the boiler adaptor.
14. Measure 25mm from the end of the flue extension and
apply a length of tape around the outer duct (Fig. 56).
15. Engage the extension into the adaptor up to this
position (Fig. 57). Once the installation of the flue is
complete and all support brackets are securely in place
remove the tape.
Adaptor
31